I am new to my position and the previous surveyor had everything set up in local sites. I am trying to finish a project that the department of transportation is asking for the information in State Plane Coordinates. I understand the false northing and easting but I am unsure how to apply the Translation north/east and rotation. If there is anyone out there willing to give me some tips on how to put this information into a formula so I can return to SPC data to sent off to the DOT that would be great. I will attach my Coordinate System Details. Thanks in advance for all those willing to help.
Coordinate System Details
Project : 1390 North Lakeshore Drive
User name rstewart Date & Time 7:48:29 AM 5/13/2014
Coordinate System Projection from data collector(at ground) Zone Zone from data collector
Project Datum (WGS 84)
Vertical Datum Geoid Model Subgrid of Geoid 99 US
Coordinate Units International feet
Distance Units International feet
Height Units International feet
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Coordinate System
Coordinate System : Projection from data collector(at ground)
Zone : Zone from data collector
Datum : (WGS 84)
Ellipsoid Name : (WGS 84)
Geoid Model : Subgrid of Geoid 99 US
Site : Not selected
Ellipsoid
Ellipsoid Name : (WGS 84)
Flattening 1/f : 298.257
Semi Major Axis : 20925646.325ift
Datum Transformation : Three Parameter
WGS84 to (WGS 84)
Translation X : 0.000ift Rotation X : N/A
Translation Y : 0.000ift Rotation Y : N/A
Translation Z : 0.000ift Rotation Z : N/A
Scale Factor : N/A ppm
Lambert Conformal Conic Two Parallel Projection
Projection Origin False Origin
Latitude : 38°20'00.00000"NFalse Northing : 6561679.790ift
Longitude : 111°30'00.00000"WFalse Easting : 1640419.948ift
Height : N/A False Elevation : N/A
Scale Factor : N/A
Shift grid name : None
Azimuth at projection centre : N/A
Azimuth at equator : N/A
Projection Parallel 1 : 40°39'00.00000"N
Projection Parallel 2 : 39°01'00.00000"N
Projection Ferro Constant : N/A
Projection Point 1 Latitude : N/A
Projection Point 1 Longitude : N/A
Projection Point 2 Latitude : N/A
Projection Point 2 Longitude : N/A
Projection grid name : N/A
Local site settings
Project latitude : 40°15'12.71710"N
Project longitude : 111°41'06.33214"W
Project height : 4601.396ift
Ground scale factor : 1.0002941562
False northing offset : 7256143.972ift
False easting offset : 1583760.019ift
GPS Site Calibration Details
Horizontal Adjustment
North Origin : 4845.095ift Translation North : 9999.972ift
East Origin : 4971.979ift Translation East : 10000.025ift
Scale : 1.00000000 Rotation : -0°00'01.534739"
Vertical Adjustment
North Origin : N/A
East Origin : N/A
Vertical constant correction : N/A
Slope North : N/A
Slope East : N/A
Network Adjustment Parameters
Longitude Deflection : N/A
Latitude Deflection : N/A
Azimuth Rotation : N/A
Network Scale : N/A
Distance Scale : N/A
Distance Constant : N/A
Height Constant : N/A
Whose software are you running on the DC and in the office? Do you have any idea if your base points are on real or assumed coordinates?
I am running all Trimble equipment and software. From the data that I can find all of the section corners and topo date in the area were shot with assumed coordinates.
Trimble Geomatics Office or Trimble Business Center?
Pablo B-)
I would setup and run at least one static session and OPUS process. Collect the control points from the previous survey, then rotate and translate to the new coordinate values.
I have both TGO and TBC.
This is good news, because Trimble software stores the original WGS lat/long data. If your control is realized in NAD83 then all you have to do is take those into a new job or project and assign your SPCS zone. If they are all assumed, then you basically have two choices:
- Do a Site Calibration on known SPCS control points
- Go observe static data on one or more of your GPS base points.
My preference would be the second option, but it would take longer. Do you have Trimble Business Center?
Start by binging all of your jobs into TBC in a project that has the correct SPCS zone and geoid model specified as the coordinate system; when it prompts you on import to keep the Project definition or the DC definition, keep the Project definition. This step strips away the site calibration (or localization, or whatever you want to call it) and gets you back to State Plane. At that point it is only a matter of whether your control is accurate; if not, go out and reobserve it.
Feel free to e-mail me directly with questions - ldrennan at mphinc dot com.
The metadata given is a bit suspect. I would be surprised if the project datum were truly WGS84. Of course the geoid model makes it look old and it may be....
I would bring the data into a clean SPC project. If you have existing trustworthy static for your base upload it to OPUS and reprocess your data.